A novel wireless passive SAW sensor based on the delay line theory

Author

Li, Tian L. ; Zheng, Liang ; Hu, Hong

Author_Institution

Dept. of Mech. Eng., Harbin Inst. of Technol., Harbin

fYear

2008

fDate

6-9 Jan. 2008

Firstpage

467

Lastpage

470

Abstract

A novel wireless passive SAW temperature and pressure sensor is designed, based on the SAW delay line theory. The effect of the temperature is included in the pressure feedback signal and a weighted factor is introduced in order to separate the temperature effect from the feedback signal. Therefore, the temperature and pressure can be accurately measured at the same time. In this sensor design, the energy converted from IDT is fully used, and the interference between the signals is minimized. The IDT and its reflectors have been optimally designed to improve the sensitivity of the sensor. This wireless passive sensor is capable of working under complicated and hard conditions.

Keywords

delay lines; feedback; interdigital transducers; interference (signal); pressure sensors; surface acoustic wave sensors; temperature sensors; wireless sensor networks; delay line theory; interdigital transducer; pressure feedback signal; pressure sensor; signal interference; surface acoustic wave; temperature sensor; wireless passive SAW sensor; Acoustic sensors; Delay lines; Mechanical sensors; Pressure measurement; Receiving antennas; Sensor phenomena and characterization; Surface acoustic waves; Temperature sensors; Tires; Wireless sensor networks; IDT; SAW; passive sensor; weighted factor;

fLanguage

English

Publisher

ieee

Conference_Titel

Nano/Micro Engineered and Molecular Systems, 2008. NEMS 2008. 3rd IEEE International Conference on

Conference_Location

Sanya

Print_ISBN

978-1-4244-1907-4

Electronic_ISBN

978-1-4244-1908-1

Type

conf

DOI

10.1109/NEMS.2008.4484373

Filename

4484373